Partie intégrante d’une stratégie de test globale, la méthode de test Hardware-In-the-Loop permet de tester des calculateurs réels intégrés dans un environnement de simulation réaliste de manière reproductible. Cela permet de réaliser des tests complets en laboratoire 24h/24 et 7j/7, de raccourcir les temps de validation et d’augmenter la gamme de scénarios de test. En outre, la méthode HIL permet de tester des bugs critiques sans problèmes de sécurité pour l’équipement testé ou l’environnement en boucle fermée ainsi que dans les configurations de test en boucle ouverte, par exemple, les tests de rejeu de données. La complexité croissante des architectures E/E hautement connectées, des véhicules électriques de plus en plus sophistiqués et des systèmes de sécurité active ADAS/AD rend les tests HIL essentiels pour garantir la fiabilité du système global. Les solutions HIL de dSPACE vont des tests d'intégration de composants aux tests d'intégration de systèmes et couvrent tous les domaines de véhicule, de la conduite autonome aux émissions zéro.
Avantages majeurs
- Solutions HIL allant des tests d’intégration de composants aux tests d'intégration de systèmes
- Pour tous les domaines de véhicules, y compris l’e-mobilité et la conduite autonome
- Chaîne d’outils de bout en bout pour des tests automatisés efficaces
- Offres complètes de conseil, d’ingénierie et de formation
- Des décennies d’expérience et un large éventail de projets clients
Solution Offer at a Glance
- Scalable real-time platforms
- Support of latest automotive bus and network standards
- Comprehensive simulation models for applications ranging from combustion engines to autonomous vehicles and electric vehicles
- Complete and fully automatable software toolchain to support continuous integration among others
- High-fidelity solutions for e-mobility applications
- Realistic camera, lidar, and radar models can be calculated in real time with dSPACE HIL systems.
Deep Dive – Test Phases and Test Systems in HIL Simulations
The development of automotive electronic systems can be divided into three main test phases: function testing; ECU testing, including perception and fusion; and ECU domain and network testing. Since each test phase focuses on different goals, the test system requirements differ as well. The dSPACE HIL systems can be adapted to each phase to provide maximum support.
Function Testing
Function testing aims at testing single or few functions, including their interaction with ECU basic software. Since this kind of testing is typically an integral part of function development rather than final release testing, its focus lies on experimental usage, without systematic test automation. Hardware-in-the-loop (HIL) test systems for function testing therefore require versatile bus and network interfaces, restbus simulation on the behavior and protocol levels, or design-for-test interfaces (e.g., XCP). If you want to test functions for autonomous driving, the test system must be able to generate sensor data on the object list level. These types of tests are often performed by the function developers themselves. Therefore, the test systems must fit on a developer’s desk.
ECU Testing Including Perception and Fusion
Typical applications for ECU tests range from software integration testing over to fail-safe and fail-operational testing, to ECU release testing. For ADAS and AD ECUs, this can even include perception and fusion algorithms also have to be verified. Testing is therefore highly automated and based on ECU requirements to cover the high number of variants. Scenario-based testing is also useful to address the many test variants, particularly in combination with automatic scenario generation.
Test systems for ECU testing require scalable I/O and bus/network interfaces, restbus simulation on the behavior and protocol level, and extensive manipulation and test options for buses and networks. Scenarios for autonomous driving are often tested using raw sensor data. These tasks require comprehensive plant models and simulation performance that can be increased accordingly. Ideally, the test system functions can be adapted to changing project requirements.
ECU Domain and Network Testing
ECU domain and network testing is characterized by end-to-end testing of distributed functions. This includes fail-safe and fail-operational tests as well as vehicle network testing, such as sleep or wake-up tests. The systems often run highly automated test programs around the clock, made possible by comprehensive test management systems.
The need for an extensive range of I/O channels as well as bus and network interfaces is characteristic for these kinds of test systems. To handle complex models and scenarios, they also require strong simulation performance and multiprocessor capabilities. The systems process a multitude of plant models, from powertrain to air conditioning to window lifter models, to name but a few. To test systems for autonomous driving, sensor signals must be simulated on either the object list or raw data level, depending on the system architecture.
Components of a Hardware-in-the-Loop System
A typical HIL system for testing ECUs includes at least simulation hardware to connect the ECU to and simulation models for simulating the environment. Additionally, you use configuration software and visualization software for a graphically representation of the simulation scenario.
Support de développement de bout en bout
Le développement de systèmes E/E complexes et de logiciels avec des fonctions toujours plus critiques pour la sécurité, en particulier dans le domaine des systèmes autonomes, pose la question de comment garantir la fiabilité des fonctions. C'est la raison pour laquelle dSPACE offre une expertise de bout en bout en matière de sécurité fonctionnelle, de développement de stratégie de test ainsi que de vérification et validation dans le cadre de processus E/E complexes - pour vous aider dès les premières étapes du projet jusqu'à l'homologation.
Les systèmes dSPACE sont simples à installer et à utiliser – cependant, si un projet est plus complexe, que vous avez besoin de solutions personnalisées ou que vous devez tenir des délais serrés, vous pouvez également faire confiance aux services d’ingénierie de dSPACE, rapides, qualifiés et fiables.
